[PHP]Error fonction mail()

mail("$_POST['destin']","$_POST['sujet']","$_POST['mail']","$_POST['exped']")

<?php
if(isset($_POST['destin']))
{
echo "Destinateur : " . $_POST['exped'] . "<br>";
echo "Destinataire : " . $_POST['destin'] . "<br>";
echo "Sujet : " . $_POST['sujet'] . "<br>";
echo "Message : " . $_POST['mail'] . "<br>";

mail("$_POST['destin']","$_POST['sujet']","$_POST['mail']","$_POST['exped']")
?>
<h3>Message envoy&eacute;</h3><br><br>
<?php
}
else
{
?>
<h3>Erreur !</h3><br><br>
<?php
}
?>

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in C:\wamp\www\if-else-boucles\mailing\script.php on line 9